Question

Help with question?
Look at picture below...

Answer 1

How do you think we should work this out?

Answer 2

I'm not sure... don't you need to find the vertex first? I honestly have no idea

Answer 3

This is the one golden rule: the point(s) where the graph crosses the x-axis, the value of y is always 0.

Answer 4

Got an idea now?

Answer 5

So y =0?

Answer 6

Yes

Answer 7

Now what do you do next?

Answer 8

Kindly respond @LifeisHouseMusic

Answer 9

Don't you plug in y to the equation...

Answer 10

Correct. Then after plugging in y=0, what kind of equation do you get?

Answer 11

I'd get 0= 2x2 − 5x + 3?

Answer 12

True. 0=2x^2-5x+3 . This is a nice quadratic equation. Solve for x, and that will give you the x intercepts. Comfortable now?

Answer 13

i got x = 1, 3/2

Answer 14

@allank

Answer 15

The answer choices look different though.. so which one would i chose?

Answer 16

Remember that the x=1 is not the x-intercept. (1,0) is the x-intercept.

Answer 17

I'm confused again..

Answer 18

Wait. I got it. Thank you! @allank

Answer 19

Nice. You're welcome :)